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P&C Changes
Phys. and Chem. Changes
Question | Answer |
---|---|
A change that occurs without changing the identity of the substance. | Physical Change |
A change that occurs by changing the identity of the substance. | Chemical Change |
When two or more substances are combined physically. | Mixture |
When two or more substances are combined chemically and can't be separated by physical means. | Compound |
Parts are mixed evenly throughout, same. | Homogeneous Mixture |
Parts are uneven throughout. | Heterogeneous Mixture |
Type of mixture where the solute is dissolved/mixed evenly in the solvent. | Solution |
The part of the solution that dissolves. | Solute |
The part of the solution that the solute dissolves in. | Solvent |
Smallest unit of matter. | Atom |
One of the 100 or more units that make up all matter, and found on the Periodic Table. | Element |
How much matter is in some thing. | Mass |
The elements and compounds you start with in a reaction/equation. | Reactant |
The elements and compounds that you end in a reaction/equation. | Product |
The ability to react with another element or compound. | Reactivity |
The number in front of the molecule. | Coefficient |
The number to the bottom right of an element that tells how many atoms there are of that element. | Subscript |
Group 1 a highly reactive group of metals that makes compounds with Group 7 (17). | Alkali Metals |
Group 7 (17) a highly reactive group of non-metals that makes compounds with Group 1. | Halogens |
Group 8 (18) a group of non-reactive, non-metals that are all gases at room temperature. | Noble Gases |